The Nancy Grace Roman Space Telescope has quietly crossed a threshold that turns a long‑planned mission into a near‑term ...

After a yearslong series of setbacks, NASA's Escape and Plasma Acceleration and Dynamics Explorers, or ESCAPADE, mission has ...

The comet is the third object ever confirmed to have entered our cosmic neighborhood from elsewhere in the galaxy. Space ...

Scientists are testing a novel way to measure cosmic expansion using time delays in gravitationally lensed quasars. Their ...

Astronomers have sighted the oldest known stellar explosion, dating back to when the universe was less than a billion years ...

Scientists in Boulder are using existing NASA spacecraft to track a rare interstellar comet called 31/ATLAS as it travels ...

NASA has visualized the cataclysm, which is thought to have caused a mysterious eruption of gamma rays captured by telescopes ...

There appears to be some unknown feature of the universe that is affecting its expansion, scientists have said. New ...

A major new study lays out plans for crewed missions to Mars, with the search for extraterrestrial life being a top priority ...

Voyager 1, NASA’s deep-space probe, could soon become the first spacecraft to reach a historic milestone. In November 2026, the probe will be one light-day from Earth.

Intermediate mass black holes (IMBH), if they exist, have between about 100 and 1,000 solar masses, placing them in between ...

New simulations of Milky Way-like galaxies reveal that the strange split between two chemically distinct groups of stars may ...